A flexible nonparametric regression model is considered in which the response depends linearly on some covariates, with regression coefficients as additive functions of other covariates. Polynomial ...

F. Downton, Linear Estimates with Polynomial Coefficients, Biometrika, Vol. 53, No. 1/2 (Jun., 1966), pp. 129-141 ...

Horadam Polynomials: A generalised family of polynomials which includes classical sequences such as Fibonacci and Lucas polynomials, utilised in deriving coefficient estimates.